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Finding the Fourth Proportional to 817.46, 1,127.91 and 468.14

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Solution

The fourth proportional to 817.46, 1,127.91 and 468.14 is: 645.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.46 : 1,127.91 = 468.14 : x
  2. Step 2: Convert to fraction form
    817.46/1,127.91 = 468.14/x
  3. Step 3: Cross multiply
    817.46x = 1,127.91 × 468.14
  4. Step 4: Simplify right side
    817.46x = 528,019.79
  5. Step 5: Solve for x
    x = 528,019.79/817.46
  6. Step 6: Final answer
    x = 645.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.